Brush



(No Model.)

BRUSH.

No. 349,727. Paten-ted sept. z8, 1886;

ZUL'ZLeSSeS N. PETERS. Prluxvmhogmpher. wnhingmn. Dg.

UNITED STATESv vlnfrlnvr OFFICE.

JAMES G. LUDDY, OF CAMBRIDGE, MASSACHUSETTS.

BRUSH.-

SPECIFICATION forming part of Letters Patent No. 349,727, dated September 28, 1886.

Application lcd January 22, 1886. Serial No. 189,400. (No model.)

scription, in connection with the accompanying drawings, is a specification, like letters-on the drawings representing like parts.

This invention has for its object to `con struct a rotary brush which shall be inexpensive and durable; and the invention consists,

essentially, in cutting or sawing the hub or core spirally, and securing the bristles in place between the coils or spirally-cut portions thus formed, thus avoiding the necessity of iilling the entire surface of the core or hub with small holes, as is now common.

In accordance with this invention the hub or core, preferably of wood and bored centrally, is cut spirally to form coils which may be separated somewhat from each other, and the bristles are then place between the coils and secured by glue, cement, or other suitable fastening, which latter also secures the coils together, thereby forming a solid and compact hub having the bristles extending radially from it at such distances apart as may be desired. Y

Figure l shows in end view a rotary brush constructed in accordance with this invention; Fig. 2, a longitudinal section, and Fig. 3 a side elevation of the hub or core alone, the coils thereof being somewhat separated from each other. i

The hub or core A, usually of wood, is preferably bored centrally, as at c. The hub or core is'then cut or sawed spirally from its outer surface entirely through to the bored central portion, as shown in Fig. 2, thereby forming a ene-piece hub or core coiled upon itself, the coils or spirally-cut portions a. being adapted to be separated somewhat from each other, as shown in Fig. 3. Any suitable bristles, c, are then secured in position by glue, cement, or other suitable material between the coils or spirally-cut portions, the

said bristles being arranged with such uniformity as may be desired. The hub A is then compressed laterally, to thereby secure the coils or spirally-cut portions a thereof, having the bristles placed between them together, when a solid hub is formed with the bristles arranged at uniform distances apart and spirally.

The coiled strip formed'by cutting the but l A is made narrower in crosssection at that portion adjacent to the bored central portion,

permitting the slit between the successive coils in which the bristles are placed to be of sufficient width to contain the fastening for the bristles, to thereby make a more compact brush; yet I do not coniine myself to such construction.

Suitable heads, c f, are applied to the. opposite ends of lthe core A, the hubs cf of said heads entering the bored central portion of the core A, and the rear side of the heads contguous to the ends of the core A are preferably cut away, as shown at m, Fig. l, in order that ample space may be left for the coils c of the core A to spread interiorly after the bristles have been secured in position.

The rotary brush herein described may be much more cheaply and easily made than those heretofore known to me, and yet an equally efficient andy durable brush is produced.

Instead of using wood, which Iprefer, to hold the bristles in place, I might use paper board, metal, or india-rubber, made into a helical core, so as to leave spaces such as shown,

-between each core for the reception of the combined with bristles secured in position between the coils of the hub, substantially as described.

3. In a rotary brush, the hub or core A, bored centrally and cut spirally, as described, having bristles placed in position between the coils of the hub7 combined with the heads cf, having the cutaway or recessed portions m, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES G. LUDDY. Vitnesses:

BERN. J. Norse, C. M. GONE.

'Ico 

